Answer "Justification for travel support" in conference registration form

Do you need assistance from the conference organizers to pay for your travel to the conference and/or accommodation? If so, give your reasons here. If not, ignore the box.

With some conferences/courses, free or subsidised travel (and even lodging) is provided by the conference organisers and/or sponsors for a certain subset of participants. The eligibility criteria varies - and may include students (undergraduate or postgraduate) or participants from listed developing countries. What I quoted are just examples. For specifics, you should refer to the details stated on the conference website or printed brochure and see if you qualify for such assistance/subsidy (and then decide if you wish to avail yourself of it). If they didn't give these details on the website or publicity materials, it is appropriate to write to them for clarification.